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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        //  let obj = {
        //     name:"张三",
        //     age:20
        // }
        // console.log(obj);
        // setTimeout(() => {  // 演示异步更改对象属性，在浏览器控制台的显示效果
        //     obj.name = "李四"; 
        // });

        //面试题  打印number
        function fn(){
            return (() => 0)()
        }
        console.log(typeof fn())
    </script>
</body>
</html>